Page 51 - Machinery Component Maintenance

36 Machinery Component Maintenance and Repair

I - mpuIE lNPVr FIELD DATA

C FLOWS. INTERSTAGE TEMPERATURES
AND PRESSURES

ISENTROPIC
STAGE
HORSEPOWER
-- POWER CONSUMPTION

ISENTROPIC
STAGE
EFFICIENCY
INCREMENTAL POWER COST
AND I
DESIGN ISENTROPIC
STAGE EFFICIENCIES
STAGE
INEFFICIENCY COST
($/DAY)

INTERCOOLER UAS I- INLET C.W. TEMPERATURE
t-
ISENTROCIC STAGE
EFFICIENCY -ADJUSTED
FOR POOR COOLING
EFFICIENCY
J

STAGE INEFFICIENCY
COST ISIDAV) DUE TO
PODR INTERSTAGE
COOLING
I
t
OUTPUT
1. ACTUAL FLOW. lSCFHl
2 X DESIGN FLOW
3. DISCHARGE PRESSURE WSlAl
4. DESIGN, lBHP/lOOO SCFI
6. ACTUAL. IBMP/lm SCF)
a. DESIGN STAGE EFFICIENCY
7. ACTUAL STAGE fFFlClENCY
1. ACTUAL STAGE EFFICIENCY CORRECTED
FOR POOR INTERSTAGE COOLING
S. COOLER INEFFICIENCY COST. lSlDAYl
10. TOTAL INEFFlUElYCY m, ILIPAY)

Figure 2-7. Simplified computer program used to evaluate compressor efficiencies.